Improvement in pipe-coupling



distinti tapes tieni Gettin.

Leiters Patent No. 91,319, dated .Tune 15, 1869.

IMPROVEMENT IN PIPE-COUPLING.

The Schedule referred to in these Letters Patent and making part of thesame.

To all persons to lwhom these presents may come:

Be it known that I, JAMES J. FIFiELD, of East Boston, in the county ofSuffolk, and State ot' Massa.- chusetts, have invented a new and usefulPipe-Coupling., and I do hereby declare the same to be fully describedin the following specification, and represented in the accompanyingdrawings, of which- Figure l denotes a side view, and

Figure; 2,a longitudinal section of two iron pipes,

connected by my said coupling.

Figure 3 is a lront view, and

Figure 4, a. section of one of the wedge-rings used in such couplings.

In carrying out my invention, I employ a short tube,

` or auxiliary pipe, to receive the ends-ot' the two pipes to becoupled, they being inserted into such tube from its oppositeextremities. Ou and around the couplingtube 1 cut a male screw,extending from each end of' the tube toward its middle-and to aprisinatic iiange, circuinscribing the coupling-tube. The bore of thecoupling-tube I construct bell-mouthed, or tapering near each end ot'it, such being to receive a ring-wedge, to encompass the pipe to 4beconnected to the couplingtube.

I also employ to cachot the screws of lthe couplingtube a nut, to screwthereon and against the larger end ofthe wedge-ring, so as to crowd thewedge-ring into the coupling-tube.

In the drawings- A B denote the two coupled pipes, and C thecoupling-pipe, a a being the-screws, and b being the prismatic tiange ofsuch pipe C.

D and D are the two wedge-rings, and

E and E are the prismatic nuts, screwed on the screws a a', and againstthe buts, or larger ends of the wedgerings.

Thenuts, when so screwed against the wedge-rings, operate to crowd thesaid rings into the conical mouths ofthe tube G, and consequently forcethem to contract such rings, so as to cause them to embrace and fitclosely to the pipes A B, and make therewith and with red-lead, putty,or other suitable joint-tightening material or compound previouslyinserted in the said mouths, tight joints between the pipe and thecoup-r ling-tube. The taper ot' each of the ring-wedges, or wedge-rings,both inside and outside, should be such as to enable the putty to fiowbetween the opposite surfaces oi' the coupling-pipe and the pipesurrounded by the wedge-ring.

The prismatic tiange b is to enable the couplingtube C to be heldstationary, by a wrench or other suitable device, while'either ot' thenut-s is being set up or unscrewed by means of another wrench applied tosuch nut. Y

This coupling will be found to be very convenient for connecting pipesor tubes used in the conveyance of water or gas, as it saves allnecessity ot' cutting screws in such pipes at their ends to becoupledfas well as revolving the pipes to effect the coupling of themtogether.

I claim, therefore, the combination and arrangement of the twoscrew-nuts, and the two wedge-rings, with the duplex bell-mouthedcoupling-pipe C, applied, or to be applied to the two pipes A B, thesaine being substantially as and for the purpose of eecting the couplingof suoli pipes A B, ,as set forth.

JAS. J. FIFIELD.

Witnesses:

R. H. EDDY, Fe I. HALE, IJr.

